Properties of Geometric Shapes
2D shapes have different numbers of sides, angles, and lines of symmetry. Knowing their properties helps us identify and classify them.
What You Need to Know
Key Concept Diagram
A polygon is a closed 2D shape with straight sides
Quadrilaterals have four sides — including squares, rectangles, rhombuses
Regular polygons have all sides equal and all angles equal
Shapes can be sorted by number of sides, angle types, or symmetry
Key Vocabulary
Polygon
A closed 2D shape with straight sides
Quadrilateral
A polygon with exactly four sides
Regular polygon
A polygon with all sides and all angles equal
Diagonal
A straight line connecting two non-adjacent corners of a polygon
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
How many sides does a hexagon have?
Question 2
Which shape has 4 equal sides AND 4 right angles?
Question 3
A regular polygon has:
Key Concepts Summary
- ●A polygon is a closed 2D shape with straight sides
- ●Quadrilaterals have four sides — including squares, rectangles, rhombuses
- ●Regular polygons have all sides equal and all angles equal
- ●Shapes can be sorted by number of sides, angle types, or symmetry